The main symptoms are: stomach cramping or discomfort, bloating, nausea, vomiting and diarrhea. You may have a low-grade fever under 101 degrees.

Most cases of stomach flu clear up on their own within a few days. Let your stomach settle by not eating or drinking for a few hours, then drink small amounts of fluids until you can keep liquids down.

Kids should drink Pedialyte; adults should drink Gatorade.

Once you've kept liquids down for 24 hours, start a BRAT diet of bananas, rice, applesauce and toast.

See a doctor if you can't keep liquids down for 24 hours or you've been vomiting for more than two days.

The most dangerous complication to watch out for is dehydration. Young children and the elderly are particularly susceptible.

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